A thread detection device for internal threads

Abstract

A thread detection device for internal threads is provided, wherein an internal thread detection moving component which can move relative to a threaded part to be detected is provided, and a detection rod is provided on the internal thread detection moving component to extend into the inside of the threaded part to be detected, and an elastic detection clamp provided on the detection rod detects the internal thread, and can detect the internal thread inside the threaded part to be detected. By lengthening the length of the detection rod, it can be suitable for longer internal threads, and can be used not only for detecting internal threads in through holes, but also for detecting internal threads in blind holes, thereby reducing the detection difficulty and improving the detection efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of threaded component quality detection, and in particular relates to a thread detection device for internal threads. Background Art

[0002] Threaded connectors are a type of workpiece commonly used in mechanical equipment. Multiple parts are connected together through threads. The quality of the threads in threaded connectors determines whether the connection between parts is firm. Therefore, in the process of manufacturing threaded connectors, it is necessary to conduct random inspections on threaded connectors to detect whether there are defects in the threads of the samples, so as to control the defective rate of the product.

[0003] Existing sampling inspection methods mostly use a screw that meshes with the internal thread to screw into the internal thread. If the screw encounters a large resistance, it means that there is a defect in the internal thread. The internal thread is judged whether it is qualified by monitoring the resistance encountered by the screw. The screw used in this inspection method cannot determine the location of the defect in the internal thread, nor can it determine whether the thread defect of the threaded connection is interruption, peeling or residual. Therefore, a detection device that can accurately detect the location and type of defect in the internal thread of the threaded connection is needed. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a thread detection device for internal threads to at least partially solve the above technical problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a thread detection device for internal threads, including an internal thread detection fixed component and an internal thread detection movable component, the internal thread detection fixed component including a detection component mechanism, a workpiece fixing frame and a bottom support, the internal thread detection movable component including a detection rod, the detection component mechanism and the workpiece fixing frame are fixedly arranged on the bottom support, the internal thread detection movable component is arranged on the detection component mechanism, the internal thread detection movable component is movably connected with the detection component mechanism, and the threaded part to be inspected is arranged on the workpiece fixing frame, wherein an elastic detection clamp is provided at the end of the detection rod, the elastic detection clamp includes a main clamp and a secondary clamp, the main clamp and the secondary clamp are rotatably connected to the detection rod, and end balls are provided at the end positions of the main clamp and the secondary clamp, and the end balls are rotatably connected to the main clamp and the secondary clamp.

[0006] Furthermore, a compression spring is provided on the main clamping jaw, two ends of the compression spring are respectively connected to the main clamping jaw and the auxiliary clamping jaw, the compression spring is in a compressed state, and a pressure sensor is provided on the compression spring.

[0007] Furthermore, the main clamping jaw is provided with a locking tenon, the locking tenon is provided with a latch, and the locking tenon is connected to the auxiliary clamping jaw through the latch.

[0008] Furthermore, the detection component mechanism includes a threaded sleeve, a sleeve bracket is provided on the threaded sleeve, and the sleeve bracket is connected to the underlying support; an external thread is provided on the outer surface of the internal thread detection moving component, and the external thread has the same thread specification as the threaded part to be inspected, and the external thread is arranged in the threaded sleeve, and the external thread is engaged with the thread of the threaded sleeve.

[0009] Furthermore, the detection component mechanism includes a rotating sleeve and a driving pneumatic motor. The rotating sleeve is provided with a sleeve bracket, and the sleeve bracket is connected to the bottom support. The rotating sleeve is provided with a coupling. The two ends of the coupling are respectively connected to the rotating sleeve and the driving pneumatic motor. The driving pneumatic motor drives the rotating sleeve to rotate through the coupling, and the internal thread detection moving component is movably arranged in the rotating sleeve.

[0010] Furthermore, the driving pneumatic motor is provided with a gas pressure relief valve, the gas pressure relief valve is connected to the atmosphere, and the gas pressure relief valve controls the maximum torque of the output shaft of the driving pneumatic motor.

[0011] Furthermore, a rotating paddle is provided inside the rotating sleeve, and a plurality of the rotating paddles are arranged in a circular array along the inner wall of the rotating sleeve. An outer groove is provided on the outer surface of the internal thread detection moving component, and the rotating paddle is engaged in the outer groove.

[0012] Furthermore, the workpiece fixing frame is provided with an opening and closing rotating shaft, and the workpiece fixing frame rotates and opens and closes around the opening and closing rotating shaft as the axis. The workpiece fixing frame is provided with a locking buckle, and the locking buckle is located on a side of the workpiece fixing frame away from the closing rotating shaft, and the locking buckle controls the opening and closing of the workpiece fixing frame.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The present invention provides an internal thread detection moving assembly that can move relative to the threaded part to be inspected, and a detection rod is provided on the internal thread detection moving assembly to extend into the interior of the threaded part to be inspected. At the same time, an elastic detection clamp provided on the detection rod detects the internal thread, and can detect the internal thread inside the threaded part to be inspected. By lengthening the length of the detection rod, it can be suitable for longer internal threads. It can be used not only to detect internal threads in through holes, but also to detect internal threads in blind holes, thereby reducing the difficulty of detection and improving detection efficiency.

[0015] 2. The main structure of the elastic detection clamp of the present invention is arranged as a main jaw, a secondary jaw and an end ball. The end ball is arranged at the end position of the main jaw and the secondary jaw, so that the end ball contacts the internal thread of the threaded part to be inspected. When the detection rod rotates inside the threaded part to be inspected, the end ball moves in the internal thread of the threaded part to be inspected. When the end ball moves to the defective position of the internal thread, the end ball is subjected to resistance acting on the detection component mechanism, thereby judging whether there is a defect in the internal thread and the location of the defect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a thread detection device for internal threads proposed in an embodiment of the present invention;

[0017] Figure 2 A front view of a thread detection device for internal threads proposed in an embodiment of the present invention;

[0018] Figure 3 A top view of a thread detection device for internal threads proposed in an embodiment of the present invention;

[0019] Figure 4 A rear view of a thread detection device for internal threads proposed by an embodiment of the present invention;

[0020] Figure 5 for Figure 4 The enlarged view at center Ⅰ;

[0021] Figure 6 A three-dimensional diagram of an internal thread detection fixing assembly of a thread detection device for internal threads proposed in an embodiment of the present invention;

[0022] Figure 7 A three-dimensional diagram of an internal thread detection moving assembly of a thread detection device for internal threads proposed in an embodiment of the present invention;

[0023] Figure 8 for Figure 7 Magnified view of center II.

[0024] Among them, 100, internal thread detection fixed component, 200, internal thread detection moving component, 300, threaded part to be inspected, 110, detection component mechanism, 111, rotating sleeve, 112, driving pneumatic motor, 113, threaded sleeve, 114, sleeve bracket, 115, coupling, 116, rotating paddle, 117, gas pressure relief valve, 118, sleeve bracket, 120, workpiece fixing frame, 121, opening and closing shaft, 122, locking buckle, 130, bottom support, 210, external thread, 220, detection rod, 221, elastic detection clamp, 222, main jaw, 223, auxiliary jaw, 224, end ball, 225, compression spring, 226, locking tenon, 227, latch, 230, external groove.

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0028] like Figure 1 , Figure 2 , Figure 5 and Figure 8As shown, this embodiment includes an internal thread detection fixed component 100 and an internal thread detection movable component 200. The internal thread detection fixed component 100 includes a detection component mechanism 110, a workpiece fixing frame 120 and a bottom support 130. The detection component mechanism 110 and the workpiece fixing frame 120 are both arranged on the bottom support 130. The internal thread detection movable component 200 is arranged in the detection component mechanism 110. The internal thread detection movable component 200 can rotate relative to the internal thread detection fixed component 100 and slide in the internal thread detection fixed component 100 at the same time. The threaded component 300 to be inspected is arranged in the workpiece fixing frame 120. When the internal thread detection movable component 200 slides on the detection component mechanism 110, it is close to the position where the threaded component 300 to be inspected is located.

[0029] In this embodiment, a detection rod 220 is provided on the internal thread detection moving component 200, and the detection rod 220 is arranged on one end of the internal thread detection moving component 200 close to the workpiece fixing frame 120. When the internal thread detection moving component 200 slides in the detection component mechanism 110, the detection rod 220 extends into the threaded component 300 to be inspected. At the same time, an elastic detection clamp 221 is provided on the detection rod 220. When the detection rod 220 enters the interior of the threaded component 300 to be inspected, the elastic detection clamp 221 contacts the internal thread of the threaded component 300 to be inspected. As the internal thread detection moving component 200 moves on the workpiece fixing frame 120, the elastic detection clamp 221 moves inside the threaded component 300 to be inspected and detects the internal thread of the threaded component 300 to be inspected.

[0030] The specific structure of the elastic detection clamp 221 in this embodiment is a main jaw 222, a secondary jaw 223 and an end ball 224, wherein the main jaw 222 and the secondary jaw 223 are both rotatably set on the detection rod 220, and the free ends of the main jaw 222 and the secondary jaw 223 are provided with end balls 224, and the end balls 224 are rotatably connected to the main jaw 222 and the secondary jaw 223. When the detection rod 220 penetrates into the interior of the threaded component 300 to be inspected, the end balls 224 on the main jaw 222 and the secondary jaw 223 are both in the internal threads of the threaded component 300 to be inspected. As the detection component mechanism 110 drives the rotation of the internal thread detection moving component 200, the end ball 224 rolls in the internal threads of the threaded component 300 to be inspected.

[0031] If the internal thread of the threaded component 300 to be inspected does not have any surface defects, the end ball 224 will roll smoothly in the above-mentioned internal thread. If there are structural defects on the internal thread of the threaded component 300 to be inspected, such as residue, it will cause raised material residues in the internal thread. When the end ball 224 moves to the defective position, the raised material residues will block the movement of the end ball 224, thereby generating resistance to the movement of the internal thread detection moving component 200. When the detection component mechanism 110 detects the resistance, it can be determined that there is a defect in the internal thread of the threaded component 300 to be inspected.

[0032] The present embodiment provides an internal thread detection movable assembly 200 that can move relative to the threaded component 300 to be inspected, and a detection rod 220 is provided on the internal thread detection movable assembly 200 to extend into the interior of the threaded component 300 to be inspected. At the same time, an elastic detection clip 221 provided on the detection rod 220 detects the internal thread, and can detect the internal thread inside the threaded component 300 to be inspected. By lengthening the length of the detection rod 220, it can be suitable for longer internal threads, and can be used not only to detect internal threads in through holes, but also to detect internal threads in blind holes, thereby reducing the difficulty of detection and improving detection efficiency.

[0033] The main structure of the elastic detection clamp 221 of this embodiment is set as a main jaw 222, a secondary jaw 223 and an end ball 224. The end ball 224 is set at the end position of the main jaw 222 and the secondary jaw 223, so that the end ball 224 contacts the internal thread of the threaded component 300 to be inspected. When the detection rod 220 rotates inside the threaded component 300 to be inspected, the end ball 224 moves in the internal thread of the threaded component 300 to be inspected. When the end ball 224 moves to the defective position of the internal thread, the end ball 224 is subjected to resistance on the detection component mechanism 110, thereby judging whether there is a defect in the internal thread and the location of the defect.

[0034] At the same time, in this embodiment, the end ball 224 is rotatably connected to the main clamping jaw 222 and the auxiliary clamping jaw 223, which can reduce the friction between the main clamping jaw 222 and the auxiliary clamping jaw 223 and the internal thread.

[0035] like Figure 5 and Figure 8 As shown, in this embodiment, a compression spring 225 is provided on the main jaw 222, and both ends of the compression spring 225 are connected to the main jaw 222 and the auxiliary jaw 223. The compression spring 225 is in a compressed state, so the compression spring 225 applies an outward elastic force to the main jaw 222 and the auxiliary jaw 223, and this elastic force makes the main jaw 222 and the auxiliary jaw 223 tend to move away from each other.

[0036] When the internal thread detection is performed in this embodiment, the main jaw 222 and the auxiliary jaw 223 enter the interior of the threaded part 300 to be inspected, and the end ball 224 moves in the internal thread. At this time, the elastic force generated by the compression spring 225 pushes the end ball 224 on the main jaw 222 and the auxiliary jaw 223 to press against the internal thread. The supporting force provided by the internal thread to the end ball 224 and the elastic force of the compression spring 225 offset each other. At this time, the pressure value monitored by the pressure sensor on the compression spring 225 is the elastic force of the compression spring 225.

[0037] If there is an interruption or peeling defect on the internal thread, when the end ball 224 moves to the position of the interruption or peeling defect, the internal thread no longer provides support to the end ball 224, and the compression spring 225 generates an elastic force to push the main jaw 222 and the auxiliary jaw 223 away from each other, causing the end ball 224 to pop out of the thread. Then the compression spring 225 stretches to its natural state and no longer generates elastic force. Therefore, the pressure sensor reading on the compression spring 225 changes, thereby determining that there are defects such as interruptions or peeling in the internal thread.

[0038] In this embodiment, a compression spring 225 is set between the main jaw 222 and the auxiliary jaw 223. When the main jaw 222 and the auxiliary jaw 223 pass through the interruption or peeling position in the internal thread, the compression spring 225 bounces the main jaw 222 and the auxiliary jaw 223 apart, and the elastic force generated by the compression spring 225 changes, thereby realizing the detection of interruption and peeling defects, increasing the types of defects that can be detected, and at the same time being able to distinguish between residual defects and interruption defects, thereby realizing functional diversification.

[0039] like Figure 5 and Figure 8 As shown, the main jaw 222 in this embodiment is provided with a locking tenon 226, and the locking tenon 226 is plugged with a pin 227, and the pin 227 pins the locking tenon 226 to the auxiliary jaw 223, thereby realizing the locking of the main jaw 222 and the auxiliary jaw 223. Before the main jaw 222 and the auxiliary jaw 223 enter the interior of the threaded member 300 to be inspected, the main jaw 222 and the auxiliary jaw 223 are locked together by the locking tenon 226. When the main jaw 222 and the auxiliary jaw 223 enter the interior of the threaded member 300 to be inspected and the end ball 224 contacts the internal thread, the pin 227 is pulled out. At this time, the end ball 224 has been engaged in the internal thread, and the elastic force generated by the compression spring 225 acts on the internal thread, so that the interruption and peeling defects on the internal thread can be detected.

[0040] like Figure 3 and Figure 4As shown, the detection assembly mechanism 110 proposed in this embodiment includes a threaded sleeve 113, and the threaded sleeve 113 is arranged on a sleeve bracket 118, and the sleeve bracket 118 is connected to the bottom support 130. At the same time, an external thread 210 is arranged on the outer surface of the internal thread detection moving assembly 200, and the internal thread detection moving assembly 200 is arranged in the threaded sleeve 113 and the external thread 210 is meshed with the threaded sleeve 113. When the detection assembly mechanism 110 drives the internal thread detection moving assembly 200 to rotate, the threaded sleeve 113 applies a rotational torque to the external thread 210 meshed therewith. Thereby, the external thread 210 is driven to advance and move in the detection component mechanism 110. The moving direction of the external thread 210 coincides with the axial direction of the external thread 210 when it rotates. By setting the threaded sleeve 113 and the external thread 210, the internal thread detection moving component 200 can be advanced and moved toward the position of the workpiece fixing frame 120 while rotating. At the same time, the main clamping jaw 222 and the auxiliary clamping jaw 223 on the internal thread detection moving component 200 are spirally advanced in the threaded component 300 to be inspected. During the movement, the end ball 224 can be spirally advanced in the internal thread of the threaded component 300 to be inspected.

[0041] The thread specification of the external thread 210 proposed in this embodiment is the same as the internal thread specification of the threaded component 300 to be inspected. Since the external thread 210 is meshed with the threaded sleeve 113, and the thread specification of the external thread 210 is the same as the internal thread specification of the threaded component 300 to be inspected, when the end ball 224 is spirally advanced in the internal thread of the threaded component 300 to be inspected, the rotation speed and advancement displacement can match the internal thread of the threaded component 300 to be inspected, avoiding additional extrusion and friction.

[0042] like Figure 3 , Figure 4 and Figure 6 As shown, the detection component mechanism 110 proposed in this embodiment also includes a rotating sleeve 111 and a driving pneumatic motor 112. The internal thread detection moving component 200 is arranged in the rotating sleeve 111. The rotating sleeve 111 is provided with a sleeve bracket 114. The rotating sleeve 111 is fixed to the bottom support 130 through the sleeve bracket 114. At the same time, a coupling 115 is connected to the rotating sleeve 111. The two ends of the coupling 115 are respectively connected to the rotating sleeve 111 and the driving pneumatic motor 112. The driving pneumatic motor 112 drives the rotating sleeve 111 to rotate through the coupling 115.

[0043] The specific structure of the detection component mechanism 110 provided in this embodiment includes a driving pneumatic motor 112. The driving pneumatic motor 112 drives the rotating sleeve 111 to rotate through the coupling 115, thereby realizing the rotation of the internal thread detection moving component 200. The driving pneumatic motor 112 has the advantages of fast response speed, controllable output torque, and cleanliness and pollution-free. During the internal thread detection process, it will not cause pollution and damage to the elastic detection clamp 221 and the threaded part 300 to be inspected.

[0044] When performing internal thread detection, the pneumatic motor 112 is driven to drive the rotating sleeve 111 to rotate through the coupling 115. When the rotating sleeve 111 rotates, it drives the internal thread detection moving assembly 200 to rotate synchronously. When the internal thread detection moving assembly 200 rotates, the external thread 210 engages with the threaded sleeve 113, so that the internal thread detection moving assembly 200 rotates and moves toward the position of the workpiece fixing frame 120. The elastic detection clamp 221 on the internal thread detection moving assembly 200 enters the threaded component 300 to be inspected in a spiral propulsion manner, and then the elastic detection clamp 221 detects the internal thread of the threaded component 300 to be inspected. After the detection is completed, the pneumatic motor 112 is driven to rotate in the opposite direction, which can drive the rotating sleeve 111 to rotate in the opposite direction, thereby driving the internal thread detection moving assembly 200 to rotate in the opposite direction and move away from the position of the workpiece fixing frame 120, so that the elastic detection clamp 221 exits the threaded component 300 to be inspected along the original trajectory.

[0045] like Figure 6 As shown, the driving pneumatic motor 112 provided in this embodiment is provided with a gas pressure relief valve 117, and the gas pressure relief valve 117 is connected to the atmosphere. When the pressure in the driving pneumatic motor 112 is too large, the gas pressure relief valve 117 relieves the pressure on the driving pneumatic motor 112, so that the output shaft of the driving pneumatic motor 112 stops moving. Therefore, the gas pressure relief valve 117 can control the maximum torque output by the driving pneumatic motor 112. The purpose of setting the gas pressure relief valve 117 is to avoid damage to the main jaw 222, the auxiliary jaw 223 and the end ball 224.

[0046] When residual defects are encountered during internal thread detection, protruding material residues will appear on the internal thread, blocking the movement of the end ball 224. At this time, the protruding material blocks the movement of the internal thread detection moving component 200, causing the pressure in the driving pneumatic motor 112 to increase. When the pressure in the driving pneumatic motor 112 increases to the pressure relief value of the gas pressure relief valve 117, the gas pressure relief valve 117 relieves the pressure on the driving pneumatic motor 112, and the internal thread detection moving component 200 stops moving, thereby avoiding pressure damage to the main jaw 222, the auxiliary jaw 223 and the end ball 224, and increasing the service life of the main jaw 222, the auxiliary jaw 223 and the end ball 224.

[0047] By observing the pressure relief of the gas pressure relief valve 117, it can be determined whether there is a residual material defect in the internal thread of the threaded part 300 to be inspected. By lowering the pressure relief value of the gas pressure relief valve 117, the detection accuracy of the residual defect can be improved.

[0048] like Figure 6 and Figure 7 As shown, the rotating sleeve 111 provided in this embodiment is internally provided with a plurality of rotating paddles 116 arranged in a circular array along the inner wall of the rotating sleeve 111, and an outer groove 230 is provided on the outer surface of the internal thread detection moving assembly 200, and the rotating paddle 116 is engaged in the outer groove 230. When the driving pneumatic motor 112 drives the rotating sleeve 111 to rotate, the rotational torque of the rotating sleeve 111 is transmitted to the outer groove 230 through the rotating paddle 116, thereby driving the internal thread detection moving assembly 200 to rotate. At the same time, when the internal thread detection moving assembly 200 moves relative to the detection assembly mechanism 110, the rotating paddle 116 slides in the outer groove 230.

[0049] like Figure 3 , Figure 4 and Figure 6 As shown, the workpiece fixing frame 120 proposed in this embodiment is provided with an opening and closing rotating shaft 121 and a locking buckle 122. The workpiece fixing frame 120 can be rotated and opened and closed along the opening and closing rotating shaft 121 as the axis. When the workpiece fixing frame 120 is opened, the threaded component 300 to be inspected can be taken and placed in the workpiece fixing frame 120. When the workpiece fixing frame 120 is closed, the locking buckle 122 locks the workpiece fixing frame 120, thereby fixing the threaded component 300 to be inspected, thereby preventing the threaded component 300 to be inspected from sliding or rotating during the inspection process.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0052] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A thread detection device for internal threads, characterized in that: The invention comprises an internal thread detection fixed component (100) and an internal thread detection movable component (200), wherein the internal thread detection movable component (200) is configured to slide in the internal thread detection fixed component (100) while rotating relative to the internal thread detection fixed component (100), the internal thread detection fixed component (100) comprises a detection component mechanism (110), a workpiece fixing frame (120) and a bottom support (130), a detection rod (220) is arranged on the internal thread detection movable component (200), the detection component mechanism (110) and the workpiece fixing frame (120) are fixedly arranged on the bottom support (130), the internal thread detection movable component (200) is arranged on the detection component mechanism (110), the internal thread detection movable component (200) is movably connected to the detection component mechanism (110), and a threaded member (300) to be detected is arranged on the workpiece fixing frame (120), wherein: The detection rod (220) is arranged on one end of the internal thread detection moving assembly (200) close to the workpiece fixing frame (120); an elastic detection clamp (221) is provided at the end of the detection rod (220); the elastic detection clamp (221) comprises a main clamping jaw (222) and a secondary clamping jaw (223); the main clamping jaw (222) and the secondary clamping jaw (223) are rotatably connected to the detection rod (220); end balls (224) are provided at the end positions of the main clamping jaw (222) and the secondary clamping jaw (223); the end balls (224) are rotatably connected to the main clamping jaw (222) and the secondary clamping jaw (223); The detection component mechanism (110) is configured to drive the internal thread detection moving component (200) to rotate, thereby driving the end ball (224) to roll in the internal thread of the threaded component (300) to be detected.

2. The thread detection device for internal threads according to claim 1, characterized in that: The main clamping jaw (222) is provided with a compression spring (225), two ends of the compression spring (225) are respectively connected to the main clamping jaw (222) and the auxiliary clamping jaw (223), the compression spring (225) is in a compressed state, and a pressure sensor is provided on the compression spring (225).

3. The thread detection device for internal threads according to claim 2, characterized in that: The main clamping jaw (222) is provided with a locking tenon (226), the locking tenon (226) is provided with a latch (227), and the locking tenon (226) is connected to the auxiliary clamping jaw (223) via the latch (227).

4. The thread detection device for internal threads according to claim 1, characterized in that: The detection assembly mechanism (110) comprises a threaded sleeve (113), a sleeve bracket (118) being provided on the threaded sleeve (113), and the sleeve bracket (118) being connected to a bottom support (130); an external thread (210) is provided on the outer surface of the internal thread detection moving assembly (200), the external thread (210) having the same thread specification as the threaded part (300) to be inspected, the external thread (210) being provided in the threaded sleeve (113), and the external thread (210) being meshedly connected with the thread of the threaded sleeve (113).

5. The thread detection device for internal threads according to claim 1, characterized in that: The detection component mechanism (110) comprises a rotating shaft sleeve (111) and a driving pneumatic motor (112); a shaft sleeve bracket (114) is provided on the rotating shaft sleeve (111); the shaft sleeve bracket (114) is connected to a bottom support (130); a coupling (115) is provided on the rotating shaft sleeve (111); two ends of the coupling (115) are respectively connected to the rotating shaft sleeve (111) and the driving pneumatic motor (112); the driving pneumatic motor (112) drives the rotating shaft sleeve (111) to rotate via the coupling (115); and the internal thread detection movable component (200) is movably arranged in the rotating shaft sleeve (111).

6. The thread detection device for internal threads according to claim 5, characterized in that: The driving pneumatic motor (112) is provided with a gas pressure relief valve (117), the gas pressure relief valve (117) is connected to the atmosphere, and the gas pressure relief valve (117) controls the maximum torque of the output shaft of the driving pneumatic motor (112).

7. The thread detection device for internal threads according to claim 5, characterized in that: A rotating paddle (116) is provided inside the rotating sleeve (111), and a plurality of the rotating paddles (116) are arranged in an array along the circumference of the inner wall of the rotating sleeve (111). An outer groove (230) is provided on the outer surface of the internal thread detection moving assembly (200), and the rotating paddle (116) is engaged in the outer groove (230).

8. The thread detection device for internal threads according to claim 1, characterized in that: The workpiece fixing frame (120) is provided with an opening and closing rotating shaft (121), and the workpiece fixing frame (120) is opened and closed by rotating around the opening and closing rotating shaft (121) as an axis. The workpiece fixing frame (120) is provided with a locking buckle (122), and the locking buckle (122) is located on a side of the workpiece fixing frame (120) far from the closing rotating shaft (121), and the locking buckle (122) controls the opening and closing of the workpiece fixing frame (120).

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